Rock-drill.



PATENTED DEC. 4, 1906.

C J SMITH ROCK DRILL.

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INV 67a k (/3272 No. 837,347. PATENTED DEC. 4, 1906. O. J. SMITH.

ROCK DRILL.

APPLICATION FILED JULY 5, 1906.

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. m A M 0 m .I a J m k W z T 3 ill afi w @W x 9mg UNITED STATES PATENT OFFICE.

CLARK J. SMITH, or OTTUMWA, IOWA, ASSIGNORTO THE HARDSOCG WONDER, DRILL 00., or OTTUMWA, IOWA. I

ROCK-DRILL.

macaw-.347.

pecification of Letters Patent.

Patented Dec. 4, 1906.

Application filed July 6, 1906. Serial No. 824,804.

My invention relates to certain new and useful improvements in rock-drills in which means'are provided for washing or blowing out the chips and dust from the apertures being drilled.

Generically my invention comprises a rockdrilling machine having means adjacent the lower or drill-receiving end whereby Water, either uncom ressed or compressed, may be fed or forced into the holebeing drilled either alone or in a mixture with the exhaust working agent used to operate the drilling engine or hammer-viz. steam or compressed an.

My invention also includes means whereby the-action ofthe exhaust worln'ng agent may be cut out entirely without cutting out the water-supply to the hole and means whereby the water-supply may be cut out while the exhaust working agent alone is used to blow out the debris from the hole being drilled. Also means are provided for so regulating the water and air supply to the drill'th'at any desired proportionate mixture of the two can be forced through the drill at will.

In its more subordinate nature my invention comprises a drilling-engine and casing therefor, whose drill receiving end is pro-, vided with a chuck and a series of radial apertures in' communication with a central passage of the hammer-b arrel of the casing, a

swivel-ring mounted on the hammer-barrel over the radial apertures to which the valved water-supply pipe connects, and a valvedj 1m act-receiving member within the chuck en of .the hammer-barrel and forming a valved assage from the exhaust-chamber of the dril ing-engine to the drill-tool. The exhaust-chamber also has a'valved exhaust:

port' by means of which the exhaust can be made to pass directly to the atmos here or thron v the drill.

With other objects in view than have been heretofore specified the invention a1so 1n-" .cludes certam novel construction, combination, and arrangement of arts, all of which will be first described in etail and then be h the impact-receiving mem er into s ecifically pointed out in the appended c aims, reference bein had to the accompanying drawings, in whic Figure 1 is a perspective view showing my invention a plied for use, the rock at the drill being s own in section to more clearly illustrate the invention. Fig. 2 is a vertical longitudinal section of the drilling-engine,

mechanism. Fig. 3 is an enlarged section of a portion thereof. Fig. 4 is a cross-section Fig. 5 is a detailon the line 4 4- of Fig. 3. perspective view of the impact-receiving member with its parts separated. Figs. 6

and 7 are detail viewsof the drill-tool.

In the accompanying drawings, in which like characters of reference indicate like arts in all of the figures, I have illustrate my present invention as applied to a drill of the type shown in my Patent No. 812,375, of,

February 13, 1906, although I do not desire resent invention is. limited in use to the drilling mechanism 'reit understood that the ferred to, as it may be adapted to any other a drilling mechanism of the reciprocating-hammer type.

1 designates the drill-casing, which is externally threaded at 1 and has an internal bore 1 to receive thehammer-barrel 2,-

which is tightly fitted thereon, with its front portion projecting beyond the front edge of the drill-casing, which is provided with a central threaded bore 1 to receive the plug 3, which has a central hollow chamber 3 anda flange 3 which abuts the end of the cas ing or barrel 1 of the drill.

with an externally-threaded portion 3 and whose end 3 is ada ted to receive the crank or handle 4, whic is secured thereto,-as shown. The plug- 3 has a plurality of radial apertures 3, which communicate with the c amber 3 and with the outside of the plug 3. 5

ortion 39' Fitted on the extension or hub of the plug 3 is a loose collar 5, w 'ch has a central internal chamber,5 to cooperate lar 5 are .eld in position by the check-nuts 9, threaded on the portion 3 of the plug 3-,iit;

The plug 3 also hasa laterally-extending portion 3 provided ICC being understood that the collar is adjusted to permit the barrel 2 and the plug 3 being I portion 1 of the chamber 1 of the casing are formed in the barrel 2 and communicate with the'interior of the barrel to the-ports 2. Within the barrel 2 the hammer-piston 13 reci rocates, and this piston has the usual head 14 and an enlarged annular portion 13 at the rear thereof, while a chamber 13 is formed within the piston 13 and is opened at the rear of the piston to communicate with the chambers 2 and 2 of the barrel 2, a series of radial ports 13 being also provided for-the same purpose, while a series of ports 13 are arranged adjacent the head 14 and open up communication between the chamber 13 and the chamber 2 when the piston is at the final limit of its stroke and permit the exhaust to pass from the chambers 2 2 into the chamber 2, which I shall hereinafter term the exhaust receiving chamber, while the piston 13 communicates with the chamber 2 when the piston is at the rear portion of its stroke to ermit the working charge toenter into the c amber 13 and the chambers 2' and 2 to for'ce the piston again forward.

As before stated, the barrel 2 rojects from the web 2 beyond the end of t e barrel-casing 1 and is provided with a shoulder 20 and a threaded portion 21, as indicated. The

drill-holding end of the barrel has a supplemental bore 22 to receive the impact-receiving member 23, hereinafter again referred to.

24 designates a collar mounted on the outer end of the barrel 2, and the collar 24 is held in lace to permit free rotation of the barrel 2 by rubber washers 26 and check-nuts 26 on the threaded portion 21 of the barrel. The collar 24 has an mternal groove orchamber 24 to communicate with the aperture 2 of the barrel 2, which aperture in turn connects with the outer annular groove 23 in the impact-receiving member 23. The collar 24 has a tap 24 to receive the water-suply pipe 25, which has a control-valve 25*, by means of which the water-sup ly to the drill 11 can be regulated. The dr' 1 11 has a central passage 11 run from end to end to conduct the water into the hole.

In-order to prevent the water being forced into the exhaust-chamber when water under pressure is used, I provide the member 23 with a back check-valve 23*, which may be held lightly seated by a coil-spring 23 as 1 debris.

In ca out my invention the drill is fed to the ho e by manipulating the crank 4, and when the valve 7 is open to permit the working agpnt to pass -(compressed air or steam) into t e casing 1 it operates the hammer-piss ton 13 in a manner which will be clearly unmy patent hereinbefore referred to. I have found b ex eriment that water ma be sent 3 f .7

into the (in under pressure and the exhaust from the drill may be also passed through with the water, thus getting very good results. The drill, however, will operate very well either with-the water alone or with the exhaust alone being forced into the drill, although I prefer to combine them. When it is desired to use a mixture of exhaust workin agent, (which, it should be understood, is sti 1 s ightly under pressure,) I open the valve of the pipe 25 to admit the water and close off the exhaust-valve of the exhaust-port from the chamber 2 thus compellin such exhaust to join the water and pass t ough the drill with it into the holeito allay the dust and force'out the debris I By properly adjusting the water-inlet valve and the exhaust-port valve I can cause the drill-operating working-agent exhaust and the water to so coact as to form, as it were, a sprayer and force the water into the hole through the drill as a spray and Without materially interfering with the quick and effective exhaust charge from the chamber 2,

it being understood that the exhaust-port valve may be opened to atmosphere sufiiciently to prevent the pressure in the exhaust-chamber accumulating to such an extent as to effect the eflicient operation of the hammer.

From the fore oing description, taken in connection with t e accompanying drawings, it will be seen that I have provided a very simple and effective constructionof drilling mechanism in which means are provided which will readily and eflectively serve their intended purposes and that by mounting the member 23 in the barrel, as shown, it will be held in place and its movement limited b the drill-chuck 10 and the shoulder 20 of the barrel 2. Again, it is thought from the foregoing description, taken in connection with the accompanying drawings, the complete construction, operation, and numerous adderstood by reference to'the drawings and to those skilled in the art to which theinvention a pertains, and I desire to say 'thatmany slig t changes in the detail con struction, arrangement, and design of parts may be readil madewithout departi from the scope of t e invention or that of t e appended claims.

WhatIclaim is- 1. In a rock-drill, the combination with the hammer-barrel and the hammer, said barrel havin an inlet and an exhaust chamber, of a dri 1 having .a longitudinalpassage therethrough and held in one end of sa1d hammer-barrel, said barrel having a waterchamber, means for admitting water into said water-chamber to ass through. said drill, said hammer-barrel havin a valved passa e between the exhaust an the water cham ers, and means for controllin -the water admission to the water-cham er, substantially as shown and described.

2. In a rock-drill, the combination with the hammer-barrel and the hammer, said barrel havin an inlet and an exhaust chamber, of a dril having a ongitudinal passage therethrough and held in one end of sa1d hammerbarrel,'said barrel having a water-' chamber, means for admitting water into said water-chamber to ass through said drill, said hammer-barrel havin -a valved passage between the exhaust an the water chambers, means for controlling the water admission to the water-chamber, said barrel having an exhaust-port from said exhaustchamber to the atmosphere.

3. In a rock-drill, the combination with the hammer-barrel and the hammer, said barrel having an inlet and an exhaust chamber, of a drill having a longitudinal passage therethrough and held in one end of sa1d hammer-barrel, said barrel having a waterchamber, means for admitting water into said water-chamber to pass through the drill, said hammer-barrel having a valved passage between the exhaust and the water chambers, means for controlling the water admission to the water-chamber, said barrel having an exhaust-port from said exhaust-chamber to the atmosphere, and means for controlling the exhaustthrough said exhaust-port.

4. In a drill, the combination with a hammer-b arrel, and a hammer mounted therein, a drill-chuck held in one end of said barrel, and a longitudinally-apertured drill held in said drill-chuck, said barrel having an exhaustchamber, said-barrel having a water-receivin chamber, an im act-receiving member he d in sa (1 water-c amber and projecting into the exhaust-receiving chamber, said impact-receiving member having a passage communicating with the exhaust-receiving chamber and the water-receiving chamber, means for admittin water into said waterchamber, said barre having an exhaust-port communicating between the exhaust-chamber and the atmosphere, substantially as shown and described. I

5. In a drill, the combination with a casing, a drilling-engine within the casing, a dull-chuck in one end of said casing, said casing having an exhaustrreceiving chamber and a water-receiving chamber, an impact-receiving member held in said water-receiving chamber and projecting into the exhaust- .receiving chamber, sa1d impact-receiving member having a passage therethrough communicating with the water and with the exhaust receivin chambers, a collar or ring mounted on said casing, said ring having an internal annular chamber, radial ports in said casing to 0 en up communication between said interna annular chamber and the waterchamber of the casing, means for passing water through said annular. ring to its annular chamber.

6. In a drill, the combination with a casin a drilling-engine within the casing, a drill-chuck in one end of said casing, said casing having an exhaust-receiving chamber and a water-receiving chamber, an impact-receiving member held in said water-receiving chamber and projecting into the exhaustreceiving chamber, sa1d impact-receiving member having a passage therethrough communicating with the water and with the exhaust receiving mounted on sa1d casing, said ring having an internal annular chamber, radial ports in said casing to open up communication between said internal annular chamber and the water-chamber of the casing, means forpassing water through said annular ring to its annular chamber, and said drill-casing having an exhaust-port to communicate between the exhaust-receiving chamber and the atmosphere.

7. In a drill, the combination with a casing, a drilling-engine within the casing, a drill-chuck in one endof said casing, said casing having an exhaustreceiving chamber and a water-receiving chamber, an impactreceiving member held in said water-receiving chamber and projecting into the exhaustreceiving chamber, said impact-receiving member having a passage therethrough communicating with the Water and with the exhaust receiving chambers, a collar or ring mounted on sa1d casing, said ring having an internal annular chamber, radial ports in said casing to open up communication between said internal annular chamber and the water-chamber of the casing, means for passing water through said annular rin to its annular chamber, said drill-casing aving an exhaust-port to communicate between the exhaust-receiving chamber, and the atmoshere, and said impact-receiving member liaving a check-valve, substantially as shown and described.

831a a-rock-drill; the combination with a drill-casing having a Water+receiving .cham

her and an exhaust-receiving chamber, of'avalved impact-receiving member held in said drill-chamber and having communicationwith the exhaust-receivingl chamber, meansfor'admitti .water'into t e water-recelving chamber, said drill havi 'an'exhaustport.

communicatin between t e said receiving chamber and t e atmosphere, means for con trolling the exhaustort, and means for comtrolling the water a mission to the water-receivin' chamber.

9'. he combination with a'drill casing, a:

piston reciprocating therein, said casing havmg an exhaust-receivin "chambernearqone' end, a water-receivingc amber in the same end adjacent the exhaust-receiving chamber,-

a drill-chuck held in 'the casing," and commu nicating with the water-receiving chamber, an-impact-receiving member held in the wa-' terreceiving chamber andprojecting into the exhaust-receiving chamber and hav1nga= passage in communication with both chain here, said impactq'eceiving'member having:

an'externalannulargroove and radial apertures connecting said groove with the internal passage ofthe impact receiving member; said drill-casing having radial apertures communicating with the water-chamber and the exterior of the casing, and an annular internally chambered heldon said 1 casing hel over said radial apertures, packing-r' on either side of said annular-ring, chec -nuts for securing said annular "r' and members 1n'pos1t1on a valve water supply plpe connected with said annular rin' an in communicationwith the internal'c amber r chamber, said exhaust-receiving chamber having an exhaust-port communicating with the atmosphere and means for controlling the outlet of the. exhaust through the exhaust-port, and means for controlling the inlet ofthe Water'to thewater chambe'r to enable the proportionate -feed of water and exhaustthrough the drill to be regulated, substantially asshown and described.

CLARK J. SMITH.

Witnesses:

F. H. HOSWELL, E. E.- THORNTON; 

